I have the Windows 7 Ultimate. I have had my background set to a particular photo without any issues. Recently I decided to change the background. Now the problem is after a few moments the background no longer is seen, but only a blank screen. Once I move the mouse, the background is back on, then after a few moments of inactivity, off again. I chose a different date to restore the computer which worked, the background stayed on, however, I no longer had my Microsoft Excel data sheets available. So I had to restore it back, but still having the issue with the background not staying on. Help.